Immunogenicity to Human Papillomavirus Vaccine (Gardasil) Among IBD Patients on Immunosuppressive Therapy

Not Applicable

Completed

• Conditions: Inflammatory Bowel Disease
• Interventions: Biological: Gardasil vaccine

• Registration Number: NCT00727636
• Lead Sponsor: Boston Children's Hospital

Brief Summary

Many IBD patients take immunosuppressive agents and we are uncertain as to their capacity to mount a truly protective response after vaccination. If IBD patients do not have an adequate immunological response, they may need to increase the dosage or get booster shots. Many clinicians who treat patients with autoimmune diseases are asking if the vaccine is safe and effective. Thus, this study has important clinical and public health significance because more than one million people in the United States have been diagnosed with IBD.

There is not much studied about HPV and immunocompromised patients. Research on healthy women who were immunized with a set of three HPV vaccines demonstrated significantly increased antibody titers. In addition, they had significantly reduced HPV incident and persistent infection and HPV-related disease (cervical, vulvar, and vaginal cancers, cervical intraepithelial neoplasia, genital warts) through five years of follow-up compared to controls who received a placebo. The HPV vaccine was well tolerated without significant side effects.

The aims of this research are to measure the immune response in 9-26 year old IBD patients who are on immunosuppressive agents after receiving the HPV vaccine compared with historical controls. We will also evaluate the number and type of vaccine-associated adverse events as well as the disease activity and flare-ups that occur after each dose of vaccine. We hypothesize that IBD patients on immunosuppressive therapy will have have a similar immune response to HPV types 6, 11, 16 and 18 at one month postdose 3 compared to healthy age-matched historical controls.

The patient population includes IBD patients who are on immunosuppressive medications. Recruiting approximately 100 patients will provide adequate power for the study. A blood sample will be taken from all IBD patients to evaluate baseline antibody levels and markers (e.g., ESR, CBC, albumin) before or immediately after immunization with the HPV vaccine. Lab tests will be redrawn at 7 months to evaluate the level of antibody titers and follow the markers. During the study, we will track basic laboratory measures, disease status by using the Pediatric Crohn's Disease Active Index or Harvey-Bradshaw Index for UC, side effects from the vaccinations, and other adverse events.

Detailed Description

Not available

Study Timeline

• Study Start: 2008-07
• Study First Submitted: 2008-07-31
• Study First Submitted QC: 2008-08-01
• Study First Posted: 2008-08-04
• Primary Completion: 2010-06
• Study Completion: 2011-04
• Status Verified: 2011-05
• Results First Submitted: 2011-05-03
• Results First Submitted QC: 2011-05-03
• Last Update Submitted: 2011-05-03
• Results First Posted: 2011-05-27
• Last Update Posted: 2011-05-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 53

Inclusion Criteria

1. Crohn's disease, ulcerative colitis, or indeterminate colitis diagnosed by standard clinical, radiographic, endoscopic, and histologic criteria.
2. Actively followed by a physician at the Children's' Hospital gastroenterology (GI) or IBD Center, or patient is referred by local clinic or hospital for our study.
3. Female gender
4. Age 9-26 years
5. Patient (18 years old) or parent is willing to provide informed consent.
6. Is currently on an immunomodulator and/or TNF inhibitor for ≥ 30 days prior to enrollment. Patients may also be using prednisone or aminosalicylates in addition to the immunomodulator or TNF inhibitor. Standard concomitant medications (e.g. antibiotics, antihistamines, acetaminophen) will be allowed

Exclusion Criteria

1. Male gender
2. Unwilling to provide consent
3. New immunomodulator added within the last 30 days, and was not previously on any immunomodulator
4. History of bleeding disorder that would make hematoma likely (e.g., hemophilia, von Willebrand's disease) or on anti-coagulation therapy (certain cases may be allowed; each case will be assessed by study doctor)
5. Hypersensitivity to the ingredients/components of the vaccine (e.g., aluminum, yeast)
6. Known pregnancy or positive pregnancy test. We will obtain a urinary pregnancy test before each dose of the vaccine is administered. Subjects participating will be informed during the consent/assent procedures that the safety of this vaccine has not been proven in pregnant women, and will be advised not to become pregnant during the study and counseled according to the guidelines of the Children's Hospital IRB.
7. Previously received HPV vaccination.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Gardasil vaccine - Prospective Study	Gardasil vaccine	Prospective study participants received the Gardasil vaccine during the study

Primary Outcome Measures

Name	Time	Method
Antibody Titer to HPV 6	Month 7
Antibody Titer to HPV 11	Month 7
Antibody Titers to HPV 16	Month 7	Geometric mean titer (95% CI)
Antibody Titer to HPV 18	Month 7	Geometric mean titer (95%CI)

Trial Locations

Locations (1)

Children's Hospital Boston; 🇺🇸 Boston, Massachusetts, United States